Orphan Black Tatiana Maslany stars as Sarah Manning, and her numerous clones in this science-fiction series returning for a new season. Kristian Bruun and Jordan Gavaris also star. 9 p.m. BBC America

The Real History of Science Fiction This new series delves into our fascination with sci-fi. Participants include William Shatner, Nathan Fillion, Richard Dreyfuss Chris Carter ("The X-Files") and more. 10 p.m. BBC America

SPECIALS

Billy Crystal 700 Sundays In his Broadway show, the comic discusses childhood memories, the unexpected death of his father, and becoming a comedian. 9 p.m. HBO

MOVIES

The Ten Commandments Moses (Charlton Heston) discovers his Hebrew heritage, hears God's call, and engages in a bitter battle with the Pharaoh Ramses (Yul Brynner) to free the Jews from slavery, leading them to the Promised Land in director Cecil B. DeMille's 1956 epic. 7 p.m. ABC